Image Credit: Nasa
Object 90377 Sedna - a distant transneptunian object best known for its highly elliptical, 11,390-year-old orbit - is currently en-route to perihelion (its closest approach to the Sun) in 2076. After that, Sedna will return to the 'space. deep and will not return for millennia, making this overview a unique (or, once in ~ 113 lifetimes) opportunity to study an object from the far reaches of our solar system. There are no Sedna missions in the works yet, but astronomers are starting to plan for the possibility and ideal launch date for such a mission is fast approaching, with two of the best launch windows coming in 2029 and 2034.
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